Fix some styling issues

src/test/java/seedu/address/logic/commands/FindByEmailCommandTest.java

@@ -2,13 +2,11 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static seedu.address.logic.Messages.MESSAGE_PERSONS_LISTED_OVERVIEW;
 import static seedu.address.logic.commands.CommandTestUtil.assertCommandSuccess;
 import seedu.address.model.person.EmailContainsKeywordsPredicate;
-import static seedu.address.testutil.TypicalPersons.CARL;
-import static seedu.address.testutil.TypicalPersons.ELLE;
-import static seedu.address.testutil.TypicalPersons.FIONA;
 import static seedu.address.testutil.TypicalPersons.INA;
 import static seedu.address.testutil.TypicalPersons.REG;
 import static seedu.address.testutil.TypicalPersons.getTypicalAddressBook;
@@ -21,15 +19,14 @@
 import seedu.address.model.Model;
 import seedu.address.model.ModelManager;
 import seedu.address.model.UserPrefs;
-import seedu.address.model.person.ContactContainsKeywordsPredicate;
 import seedu.address.model.person.NameContainsKeywordsPredicate;
 
 /**
  * Contains integration tests (interaction with the Model) for {@code FindByContactCommand}.
  */
 public class FindByEmailCommandTest {
-    private Model model = new ModelManager(getTypicalAddressBook(), new UserPrefs());
-    private Model expectedModel = new ModelManager(getTypicalAddressBook(), new UserPrefs());
+    final private Model model = new ModelManager(getTypicalAddressBook(), new UserPrefs());
+    final private Model expectedModel = new ModelManager(getTypicalAddressBook(), new UserPrefs());
 
     @Test
     public void equals() {
@@ -42,20 +39,20 @@ public void equals() {
         FindByEmailCommand findSecondCommand = new FindByEmailCommand(secondPredicate);
 
         // same object -> returns true
-        assertTrue(findFirstCommand.equals(findFirstCommand));
+        assertEquals(findFirstCommand, findFirstCommand);
 
         // same values -> returns true
         FindByEmailCommand findFirstCommandCopy = new FindByEmailCommand(firstPredicate);
-        assertTrue(findFirstCommand.equals(findFirstCommandCopy));
+        assertEquals(findFirstCommand, findFirstCommandCopy);
 
         // different types -> returns false
-        assertFalse(findFirstCommand.equals(1));
+        assertNotEquals(1, findFirstCommand);
 
         // null -> returns false
-        assertFalse(findFirstCommand.equals(null));
+        assertNotEquals(null, findFirstCommand);
 
         // different person -> returns false
-        assertFalse(findFirstCommand.equals(findSecondCommand));
+        assertNotEquals(findFirstCommand, findSecondCommand);
     }
 
     @Test
@@ -92,4 +89,5 @@ public void toStringMethod() {
     private EmailContainsKeywordsPredicate preparePredicate(String userInput) {
         return new EmailContainsKeywordsPredicate(Arrays.asList(userInput.split("\\s+")));
     }
+
 }